Cleaning sponge



FIG. 1 is a top perspective view of a cleaning sponge showing my new design;

FIG. 2 is a top plan view thereof, the bottom plan view being identical thereto;

FIG. 3 is a right side elevation view thereof, the left side view being identical thereto; and,

FIG. 4 is front elevation view thereof, the rear elevation view being identical thereto. 

CLAIM The ornamental design for a cleaning sponge, as shown and described. 